package com.yunpi.yunpicturebackend.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.yunpi.yunpicturebackend.constant.UserConstant;
import com.yunpi.yunpicturebackend.exception.BusinessException;
import com.yunpi.yunpicturebackend.exception.ErrorCode;
import com.yunpi.yunpicturebackend.exception.ThrowUtils;
import com.yunpi.yunpicturebackend.manager.auth.StpKit;
import com.yunpi.yunpicturebackend.model.dto.user.UserQueryRequest;
import com.yunpi.yunpicturebackend.model.dto.user.UserRegisterRequest;
import com.yunpi.yunpicturebackend.model.enpity.User;
import com.yunpi.yunpicturebackend.model.enums.UserRoleEnum;
import com.yunpi.yunpicturebackend.model.vo.LoginUserVO;
import com.yunpi.yunpicturebackend.model.vo.UserVO;
import com.yunpi.yunpicturebackend.service.UserService;
import com.yunpi.yunpicturebackend.mapper.UserMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

/**
* @author 86153
* @description 针对表【user(用户)】的数据库操作Service实现
* @createDate 2025-04-12 13:59:21
*/
@Service
@Slf4j

public class UserServiceImpl extends ServiceImpl<UserMapper, User>
    implements UserService {


    /**
     * 用户注册
     * @param userRegisterResquest
     * @return
     */
    @Override
    public long userRegister(UserRegisterRequest userRegisterResquest) {
        //1.检验参数
         String userAccount = userRegisterResquest.getUserAccount();
         String userPassword = userRegisterResquest.getUserPassword();
         String checkPassword = userRegisterResquest.getCheckPassword();
        ThrowUtils.throwIf(StrUtil.hasBlank(userAccount), ErrorCode.PARAMS_ERROR,"参数为空");
        ThrowUtils.throwIf(userAccount.length()<4, ErrorCode.PARAMS_ERROR,"账户名过短");
        ThrowUtils.throwIf(userPassword.length()<8 || checkPassword.length()<8,ErrorCode.PARAMS_ERROR,"密码小于8位数");
        ThrowUtils.throwIf(!userPassword.equals(checkPassword), ErrorCode.PARAMS_ERROR,"两次输入密码不一致");

        //2.检查账号是否和数据库重复
        QueryWrapper<User> userQueryWrapper = new QueryWrapper<>();
        userQueryWrapper.eq("userAccount",userAccount);
        Long count = this.baseMapper.selectCount(userQueryWrapper);
        ThrowUtils.throwIf(count>0,ErrorCode.PARAMS_ERROR,"账号重复");

        //3.密码加密
        String encryptPassword = getEncryptPassword(userPassword);
        //4.插入导数据库中
        User user =new User();
        user.setUserAccount(userAccount);
        user.setUserPassword(encryptPassword);
        user.setUserName("无名");
        user.setUserRole(UserRoleEnum.USER.getValue());
        boolean save = this.save(user);
        ThrowUtils.throwIf(!save, ErrorCode.SYSTEM_ERROR,"用户注册失败，数据错误");
        return user.getId();
    }

    /**
     * 登录
     * @param userAccount  用户账户
     * @param userPassword 用户密码
     * @param request
     * @return
     */

    @Override
    public LoginUserVO userLogin(String userAccount, String userPassword, HttpServletRequest request) {
        //1.校验参数
        ThrowUtils.throwIf(StrUtil.hasBlank(userAccount), ErrorCode.PARAMS_ERROR,"参数为空");
        ThrowUtils.throwIf(userAccount.length()<4, ErrorCode.PARAMS_ERROR,"账户名过短");
        ThrowUtils.throwIf(userPassword.length()<8 ,ErrorCode.PARAMS_ERROR,"密码小于8位数");
        //2.对用户传输过来的密码加密
        String encryptPassword = getEncryptPassword(userPassword);
        //3、查询用户是否存在
        QueryWrapper<User> userQueryWrapper = new QueryWrapper<>();
        userQueryWrapper.eq("userAccount",userAccount);
        userQueryWrapper.eq("userPassword",encryptPassword);
        User user = this.baseMapper.selectOne(userQueryWrapper);
        //不存在，抛异常
        ThrowUtils.throwIf(user==null,ErrorCode.PARAMS_ERROR,"用户账号不存在或者密码不错误");
        //4.保存用户的登录状态
        request.getSession().setAttribute(UserConstant.USER_LOGIN_STATE, user);
        //记录用户登录态到sa-token，便于空间权限鉴权时使用，注意保证该用户信息与SpringSession中的信息过期时间一致
        StpKit.SPACE.login(user.getId());
        StpKit.SPACE.getSession().set(UserConstant.USER_LOGIN_STATE, user);
        return this.getLoginUserVO(user);
    }

    /**
     * 获取脱敏后的登录信息
     * @param user
     * @return
     */
    @Override
    public LoginUserVO getLoginUserVO(User user) {
        if (user==null){
            return null;
        }
        LoginUserVO loginUserVO = new LoginUserVO();
        BeanUtil.copyProperties(user,loginUserVO);
        return loginUserVO;
    }

    /**
     * 获取脱敏后的用户信息
     * @param user
     * @return
     */
    @Override
    public UserVO getUserVO(User user) {
        if (user==null){
            return null;
        }
        UserVO UserVO = new UserVO();
        BeanUtil.copyProperties(user,UserVO);
        return UserVO;
    }

    /**
     * 管理员获取脱敏后的用户信息列表
     * @param userList
     * @return 脱敏后的用户信息列表
     */

    @Override
    public List<UserVO> getUserVOList(List<User> userList) {
        if (CollUtil.isEmpty(userList)){
            return new ArrayList<>();
        }
        return userList.stream()
                .map(this::getUserVO)
                .collect(Collectors.toList());
    }

    /**
     * 获取当前登录用户
     *
     * @param request
     * @return
     */
    @Override
    public User getLoginUser(HttpServletRequest request) {
        //判断是否已经登录
        Object userObj = request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        User currentUser = (User) userObj;
        if (currentUser==null || currentUser.getId() ==null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        //从数据库中查询（追求性能的话可以注释，直接返回上述结果）
        Long userId = currentUser.getId();
        currentUser = this.getById(userId);
        if (currentUser==null){
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        return currentUser;
    }

    /**
     * 用户注销
     *
     * @param request
     * @return
     */
    @Override
    public boolean userLogout(HttpServletRequest request) {
        //判断是否登录
        Object userObj = request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        if (userObj==null){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"未登录");
        }
        //移除登录态
        request.getSession().removeAttribute(UserConstant.USER_LOGIN_STATE);
        return true;
    }

    @Override
    public QueryWrapper<User> getQueryWrapper(UserQueryRequest userQueryRequest) {
        if (userQueryRequest ==null){
            throw new BusinessException(ErrorCode.PARAMS_ERROR,"请求参数为空");
        }
        Long id = userQueryRequest.getId();
        String userName = userQueryRequest.getUserName();
        String userAccount = userQueryRequest.getUserAccount();
        String userProfile = userQueryRequest.getUserProfile();
        String userRole = userQueryRequest.getUserRole();
        String sortField = userQueryRequest.getSortField();
        String sortOrder = userQueryRequest.getSortOrder();
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(ObjUtil.isNotNull(id), "id", id);
        queryWrapper.eq(StrUtil.isNotBlank(userRole), "userRole", userRole);
        queryWrapper.like(StrUtil.isNotBlank(userAccount), "userAccount", userAccount);
        queryWrapper.like(StrUtil.isNotBlank(userName), "userName", userName);
        queryWrapper.like(StrUtil.isNotBlank(userProfile), "userProfile", userProfile);
        queryWrapper.orderBy(StrUtil.isNotEmpty(sortField), sortOrder.equals("ascend"), sortField);
        return queryWrapper;

    }
    /**
     * 判断用户是否为管理员
     * @param user
     * @return
     */
    @Override
    public boolean isAdmin(User user) {
        return user!=null &&UserRoleEnum.ADMIN.getValue().equals(user.getUserRole());

    }


    /**
     * 获取加密后的密码
     * @param userPassword
     * @return
     */
    @Override
    public String getEncryptPassword(String userPassword){
        //加严，混淆密码
         final String SALT= "kang";

        return DigestUtils.md5DigestAsHex((userPassword+SALT).getBytes());
    }


}




